Pliers



' J. G. SLAGK.

yPLIERS.

Patented June 28, 1898'.

@Howling (No Model.)

Nol 606,591.

VIo

. UNITED STATES PATENT OFFICE.

JOHN COLEMAN s'LAcK, OE BROOKLYN, NEW YORK.

-SPECIIIGA'lION forming part of Letters Patent No. 606,591, dated June 28,1898. v Application tiled July 31,1897. Serial No. 646,668. (No'inodel.)Y

To all whom tm/ty concern:

Beit known that I, JOHN COLEMAN SLAOK, of Brooklyn, (Green Point,) in the county of Kings and Stateof New York, have invented certain new. and useful `Improvements yin Pliers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art -to which it appertains to make and use the same.

vThis invention has reference to a novel construction in devices'for cutting" screwthreads, and refers more especially to pliers that are adapted for this purpose.

The invention consists in the features o construction hereinafter described and spe ciically claimed.

i In" the accompanying drawings, forming part of this specification, Figure 1 is-a side elevation of pliers constructed in accordance with this invention. Fig. 2 is a side view of one of the jaws of ythe pliers and taken from the inner side thereof. Fig. 3 is a longitudinal section. Y v Y Referring now to said drawings, 1 and 2 indicate the jaws of the pliers, and 3 and 4 the respect-ive handles therefor. These parts are pivotedtogether in any approved manner, and fastened to one of the handles is a spring 5, that presses against the inner face of the other handle and serves normally to open the jaws. v In the inner face of each of the jaws is a rectangular notch 6 to receive the dies 7, A

said diesbeingof ordinary structure and {itting lwithin said notches. For holding 'the Y dies in place each of the jaws is provided with a groove 8 in the rear wall of the notch 6 to receive pins 9, while at the front end of vthe notches 6 are tapered openings 10, extending through the jaws to receive. the `tapered pins 11. Tlie grooves 8 at the rear ends of the notches receive the greater part of the pins, so that they are held in place, while the .openings 10 receive half of the pins. The dies 7 are provided with grooves 12 and 13 at the ends thereof to receive pins 9 and 11, it being noted that the grooves 12 are deeper than the grooves 13. One jaw is provided with a setscrew 14, having a jam-n ut 15, said set-screw passing through the jaw, so that Yits inner end can be screwed into engagement with the inner face of the jaw 2, and thus regulate the extent to which the jaws can be closed in.

adjusting the dies and the diameter of the bOlt.-

The dies 7 are made of different sizes for differenbsized bolts which are to be cut, and

uponbolts, and is generally used in connection with lathe-chucks for such formation.

The construction and operation of the dei vice is very simple and cheap, but at the i same time very eifective, as the removability of the dies permits of the device being set to cutjthreads of any desired size without altering itsstructure.

Having thus described my invention, what I claim as new, and desire to secure byLetters Patent, is-

1. The combination with a pair of pliers lhaving notches formed in the inner faces of the jaws thereof, -a groove at the inner ends of said notches, a deeper opening at the outer ends of said notches, and dies situated within vsaid notches and provided with grooves at their ends to receive pins that are inserted in said grooves and Openings.

2. The combination with a pair of pliers having notches in the inner faces of the jaws, grooves at the inner ends of said notches and openings at the outer ends of-'said notches,

v notches which extend into the grooves of the dies.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses. Y

JOI-IN COLEMAN SLACK.

Witnesses: I

CHARLES E. SLAoK, EDWIN 1I. COOKE.

IOO 

